能否在Makefile (GNU Make)中为一个目标创建一个可选的依赖关系?
help:
@echo Usage:
clean:
@echo Cleaning...
build: clean?
@echo Building...
预期的输出。
$ make
Usage:
$ make clean
Cleaning...
$ make build
Building...
$ make build clean
Cleaning...
Building...
$ make clean build
Cleaning...
Building...
目标的集合 是固定的 和 下不去手,即
rebuild: clean build
.PHONY: rebuild
是不可接受的。
是的,你可以这样做。
build: $(filter clean,$(MAKECMDGOALS))
@echo Building...
参见: https:/www.gnu.orgsoftwaremakemanualhtml_nodeGoals.html和 https:/www.gnu.orgsoftwaremakemanualhtml_nodeText-Functions.html#index-filter